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← ScienceWhich outcome occurs when thermal load exceeds graphite's sublimation threshold used in rocket nozzles?
A)Increased enthalpy of dissociation occurs✓
B)Molecular weight reduction slows impulse
C)Reduced turbulent kinetic energy appears
D)Decreasing specific volume elevates pressure
💡 Explanation
Increased enthalpy of dissociation occurs during sublimation of graphite because strong covalent bonds between its carbon atoms break endothermically, therefore consuming energy rather than simply melting. Alternative thermal effects include temperature distributions not phase changes.
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